18754609 has 2 divisors, whose sum is σ = 18754610. Its totient is φ = 18754608.

The previous prime is 18754607. The next prime is 18754613. The reversal of 18754609 is 90645781.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15681600 + 3073009 = 3960^2 + 1753^2 .

It is a cyclic number.

It is not a de Polignac number, because 18754609 - 2¹ = 18754607 is a prime.

Together with 18754607, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (18754607) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9377304 + 9377305.

It is an arithmetic number, because the mean of its divisors is an integer number (9377305).

Almost surely, 2^18754609 is an apocalyptic number.

It is an amenable number.

18754609 is a deficient number, since it is larger than the sum of its proper divisors (1).

18754609 is an equidigital number, since it uses as much as digits as its factorization.

18754609 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 60480, while the sum is 40.

The square root of 18754609 is about 4330.6591876988. The cubic root of 18754609 is about 265.6864084827.

The spelling of 18754609 in words is "eighteen million, seven hundred fifty-four thousand, six hundred nine".